The South American Development Company has at their mines in Zaruma, Ecuador, a large body of low grade ore known as the Contabria Vein. This ore has continually been a source of trouble when treating it in the mill with ...

The profit derived from mines encourage people to invest in and operate them. These profits are subject to great variation as a result of changes in the price of metals, the cost of supplies and labor, and the mining ...

That charcoal has the property of precipitating certain metals from their solutions is no new discovery. John Percy (1)* mentions the work done in this connection as early as 1848 by Lasowski and he also gives some results ...

The Latouche plant of the Kennecott Copper Corporation is located on Latouche Island in the Prince William Sound district of Alaska, sixteen hundred miles northwest of Seattle, or two thousand miles by the steamship lines. ...

The property of the Ilocos Manganese Mining Company, located at Sitio Siec, Barrio of Burgos, Province of Ilocos Norte, Island of Luzon, Commonwealth of the Philippines was carefully examined by the author. The time consumed ...

The purpose of this paper is to discuss the pumping station installed on the 3314 level of the Carlos Francisco mine of the Sociedad Minera Backus y Johnston del Peru, located at Casapalca, Peru. However, so much preliminary ...